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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:40  
clear_day Transit: 12:10  
SunsetSet: 17:41
sunny DaytimeWhat's Visible Now?
All Constellations » Auriga » 


Altitude: 17.3°   Azimuth: 18.8°   Direction: North-North-East

HR2172 is a giant star in the constellation of Auriga.

HR2172 visual magnitude is 6.3. Because of its reltive faintness, HR2172 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR2172 is 0.011 arcsec per year in Right Ascension and -0.07 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR2172 star
DSS2 image of HR2172. The red arrow shows the motion of HR2172 during the next 10000 years (1.83 arcmin in Right Ascension and -11.67 arcmin in declination);

Key facts about HR2172


HR2172 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 17.3°
Azimuth: 18.8°
Direction: North-North-East

Celestial coordinates and finder chart of HR2172

HR2172 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR2172 are provided in the following table:

06h 11m 45s
+52° 38’ 49”

The simplified sky map below shows the position of HR2172 in the sky:

Finder chart HR2172 star
Simplified finder chart for HR2172.

Visibility of HR2172 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR2172 is circumpolar and transits at 19:23 UTC (altitude: 88.8°)

Distance of HR2172 from the Sun and relative movement

HR2172 is distant 326.98 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

100.30 pc
326.98 ly
11 km/s
0.011 arcsec/year
-0.07 arcsec/year

Spectral properties of HR2172

HR2172 belongs to spectral class A5 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR2172 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR2172. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR2172